it suddenly started working again support was wanting me to change all kinds of things, sometimes contrary to what the dreamhost wiki said… i pretty much refused most of it, they had me get a telnet client for my phone to test with, just as that happaned it magically started working again 5 days after it started. Support claimed they did nothing, but i think someone did, perhaps another dept.

I would recommend that everyone use SSL ON for both incoming and outgoing. (otherwise you’re sending your password in clear text.) The ports I’ve used with my iPhones for about 4 years now are suggested here: http://wiki.dreamhost.com/Secure_E-mail but to clarify: Incoming(IMAP) 993, Outgoing(SMTP) 587

Did you answer the OP’s question? No you took the approach that support always takes, it’s a problem with the customers iPhone setup. The OP also clearly stated:

allypally:

i have been unable to send emails on my iPad since 8 am on friday. I had not touched my settings so have no idea how this has happened.

I have been in touch with Dreamhost support - but nothing they have advised me to do has worked. I have deleted my email account and re-entered it - this made no difference

Has anyone else had this problem? and if so what did you do to solve it?

Let’s restate that:
–It used to work, it suddenly stopped at this time approx.
–No nothing was changed in the iPhones settings.
–The account has been deleted and re-added with the assistance of Dreamhost Support.
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Also if you are in the process of updating the iPhone wiki as mentioned I think the single most confusing thing (that i’ve pointed out in multiple threads here) is that in SMTP setup on the iPhone the word “optional” appears for username and password. Of course that means that it’s optional on the iPhone side, Dreamhost however requires username and password for all SMTP connections, therefor it’s not optional. There should be a note in your documentation stating that it’s NOT OPTIONAL as suggested on the iPhone screen.